My friend got a really good deal on a Dell (E6600, 2GB, 8300GS) so he bought that with a view to upgrading the graphics card with my old 7900GT. However when we opened it there wasn't a PEG power connector! And not even a pair of molexes 
So would it be possible to:
a) Convert the existing SATA and floppy connectors to an 8-pin PEG connector.
or if this is not possible
b) Could you advise us on a good card to get which is slot-powered (I'm guessing 8600GT is the best at the moment).
Cheers,
Suman

So would it be possible to:
a) Convert the existing SATA and floppy connectors to an 8-pin PEG connector.
or if this is not possible
b) Could you advise us on a good card to get which is slot-powered (I'm guessing 8600GT is the best at the moment).
Cheers,
Suman